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    <script>
        // 解构赋值: es6允许我们按照一定的模式,从数组,对象中提取出值然后赋值给对应的变量
        // let arr = [1, 2, 3]
        // let a = arr[0]

        let [a, b, c] = [1, 2, 3]
        let [d, e, f] = arr
        console.log(a, b, c)
        console.log(d, e, f)
        // 如果不加let / const关键字,相当于就是var声明的,会成为window的属性,挂到全局
        ;[(g, h)] = [11, 22]
        console.log(g, h, window.h)
        ;[1, 2, 3].forEach((item) => console.log(item))

        //交换两个变量的值
        let hh = 66
        let ff = 88
        // let temp
        // temp = hh
        // hh = ff
        // ff = temp
        ;[ff, hh] = [hh, ff]
        console.log(ff, hh)  //66 88
    </script>
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